K-P-O wrote:
The serial number of my mac is not valid? Im in Factory Reset at the moment.. i only found at the back of my macbook. Is that enough?
Verify you are not mistaking a zero for the Letter 0, you can not discern this so easily from the back print.
If you have other access on-line, you can copy and paste off the support page, if in doubt:
https://support.apple.com/my-support
Apple does not use Letter O for this reason. If you copy and paste into plain txt, it will make the distinction clear
Contact Apple Support to update your Apple device information.
https://support.apple.com/en-us/HT202703